The photoinduced disproportionation of tris(2,2′-bipyridine)Ru(II) in a porous glass matrix

Photoluminescence of a Porous Vycor Glass; Surface-Enhanced Photocatalyzed Conversion of CO2 to CH4

“…As “molecular-like” entities on the PVG surface, their spectroscopic properties are described in terms of molecular spectroscopy. Since PVG does not exhibit an ESR resonance, the electronic ground states are designated as singlets, 1 SiOH­(H 2 O) x and 1 SiOSi­(H 2 O) y . Beyond the shoulder that appears at 244 nm after reducing the water content to 1.4 × 10 –3 mol/g, however, the UV spectrum (Figure ) is not sufficiently resolved to identify additional specific transitions.…”

“…Each emission has a different excitation spectrum (Figure SI-4), which are integer multiples of the 1367 nm SiOH­(H 2 O) x and 2206 nm SiOSi­(H 2 O) y absorptions (Figure ). And neither emission is quenched by O 2 , a known quencher of triplet states. − − Although the emission spectra overlap, 1 SiOH­(H 2 O) x * and 1 SiOSi­(H 2 O) y * appear to be electronically distinct sites. In energy, the 340 nm excitation of SiOH­(H 2 O) x and its corresponding 392 nm emission are nested within the energy range defined by the 315 nm excitation of SiOSi­(H 2 O) y and its corresponding 404 nm emission.…”

Spectroscopic evidence of a net formation of MV+ via photolysis of Ru(bpy)32+ and MV2+ adsorbed on porous Vycor glass

“…1978, 100, 282. (18) Phenyl azide19 and 4-bromo-, 4-nitro-, and 2,4,6-tribromophenyl azide20 were prepared according to literature procedures, were purified by using either multiple vacuum distillations or recrystillizations, and were characterized by infrared and ultraviolet-visible absorption spectral and melting point techniques. (19) Lindsay, R. O.; Allen, C.…”